Additionally, LVEF (%) was 51.1 ± 14.9 in the OHAT-J ≤ 2 group and 56.0 ± 13.4 in the OHAT-J ≥ 3 group (P = 0.162), and BNP at admission (pg/mL) was 779.5 ± 655.9 in the OHAT-J ≤ 2 group and 646.0 ± 544.8 in the OHAT-J ≥ 3 group (P = 0.364), with no significant differences in cardiac function or HF markers. The gene discussed is NPPB; the disease is hydrops fetalis.